Blue Cross and Blue Shield of Illinois
300 East Randolph Street
Chicago, Illinois 60601-5099
Make a Payment
Mail your payment to the address on your premium invoice or learn about other convenient ways to pay your bill.
Product and Program Contact Information
If you are a member with a question about your coverage, please contact Customer Service or a specific department listed on this page:
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Individual and Family Plans
If you have coverage through your employer, call the toll-free number on the back of your ID card.
Under 65 New Enrollment
1-866-514-8044
Monday – Friday: 8 a.m. – 8 p.m. CT
Saturday: 8 a.m. – 6 p.m. CT
Sunday: 10 a.m. – 2 p.m. CT
Under 65 Customer Service for Existing Members
1-800-538-8833
Monday – Friday: 7 a.m. – 8 p.m. CT
Saturday: 8 a.m. – 5 p.m. CT
Sunday: Closed
Medicare Supplement New Enrollment
1-800-646-3000
Medicare Supplement Customer Service
1-877-384-9297
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Group Plans
For customer service, call the toll-free number listed on your member ID card.
HMO Illinois®/Blue Advantage HMOSM
HMO: Call the toll-free number listed on your member ID card
HMO Blue USA (away from home urgent care): 1-800-810-BLUE (2583)
PPO
PPO: Call the toll-free number listed on your member ID card
Out-of-Area BlueCard PPO Providers: 1-800-810-BLUE (2583)
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Additional Contact Information
Pharmacy Program
1-800-423-1973
Membership Address
Blue Cross and Blue Shield of Illinois
P.O. Box 3004
Naperville, IL 60566-9747
Claims Address
Blue Cross and Blue Shield of Illinois
P.O. Box 805107
Chicago, IL 60680-4112
Human Resources Inquiries
1-866-977-7378
Supplier Registration
If you are interested in conducting business with Blue Cross and Blue Shield of Illinois, this link takes you to our Supplier Registration Portal.
